Polygonal patterned ground
Videos
Polygonal, patterned ground is quite common in some regions of Mars. It is commonly believed to be caused by the sublimation of ice from the ground. Sublimation is the direct change of solid ice to a
A similar process occurs on Nile crocodiles. Their snout skins crack during embryo development, forming polygonal patterns.
Wide view of crater containing polygons with frost in the low parts, as seen by HiRISE under the HiWish program
Closer view of polygons with frost in the low parts, as seen by HiRISE under the HiWish program
Close view of polygons with frost in the low parts, as seen by HiRISE under the HiWish program Circular shapes are also visible.
Climate of Mars
Videos
The climate of Mars has been a topic of scientific curiosity for centuries, in part because it is the only terrestrial planet whose surface can be easily directly observed in detail from Earth with he
Martian morning clouds (Viking Orbiter 1, 1976)
Mars – most abundant gases – (Curiosity rover, Sample Analysis at Mars device, October 2012)
June 6, 2018
November 25, 2012